<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    section {
      position: relative;
      width:100%;
      min-height: 100vh;
      background:url(./风景.jpg);
      background-size: cover;
    }
    section::before {
      content:'';
      position:absolute;
      top:0;
      left:0;
      width: 100%;
      height: 100%;
      background: url(./splash.jpg);
      background-position: center;
      mix-blend-mode: screen;
      background-size: 1230px;
    }
  </style>
</head>
<body>
  <section></section>
</body>
</html>